Show that every polynomial function is continuous.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
$A$ function $p$ is defined as a polynomial function if it is of the form $p(x) = a_{0} + a_{1}x + \ldots + a_{n}x^{n}$,where $n$ is a natural number,$a_{n} \neq 0$,and $a_{i} \in \mathbb{R}$.
This function is defined for all real numbers $x \in \mathbb{R}$.
For any arbitrary real number $c$,the limit of the function as $x$ approaches $c$ is given by:
$\lim_{x \to c} p(x) = \lim_{x \to c} (a_{0} + a_{1}x + \ldots + a_{n}x^{n})$
Using the properties of limits,this becomes:
$\lim_{x \to c} p(x) = a_{0} + a_{1}c + \ldots + a_{n}c^{n} = p(c)$
Since $\lim_{x \to c} p(x) = p(c)$ for any real number $c$,the function $p(x)$ is continuous at every point in its domain.
Therefore,every polynomial function is continuous.

Explore More

Similar Questions

If $f(x)$,defined below,is continuous at $x = 4$,then find the values of $a$ and $b$ given that $f(x)$ is continuous on the interval $[0, 8]$.
$f(x) = \begin{cases} x^2 + ax + b, & 0 \leq x < 2 \\ 3x + 2, & 2 \leq x \leq 4 \\ 2ax + 5b, & 4 < x \leq 8 \end{cases}$

Let $f(x) = \begin{cases} \alpha + \frac{\sin [x]}{x}, & \text{if } x > 0 \\ 2, & \text{if } x = 0 \\ \beta + \left[ \frac{\sin x - x}{x^3} \right], & \text{if } x < 0 \end{cases}$ where $[x]$ denotes the greatest integer function. If $f$ is continuous at $x = 0$,then $\beta - \alpha$ is equal to

Show that the function defined by $g(x)=x-[x]$ is discontinuous at all integral points. Here $[x]$ denotes the greatest integer less than or equal to $x$.

The set of points of discontinuity of the function $f(x) = x - [x]$,where $x \in R$,is:

If $f(x) = \begin{cases} \frac{1-\sqrt{2} \sin x}{\pi-4x} & \text{if } x \neq \frac{\pi}{4} \\ a & \text{if } x = \frac{\pi}{4} \end{cases}$ is continuous at $x = \frac{\pi}{4}$,then $a$ is equal to

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo